$ git clone -n https://src.fedoraproject.org/rpms/golang-github-alecthomas-participle2.git /var/lib/mock/f45-build-11714-434/root/chroot_tmpdir/scmroot/golang-github-alecthomas-participle2
Cloning into '/var/lib/mock/f45-build-11714-434/root/chroot_tmpdir/scmroot/golang-github-alecthomas-participle2'...
$ git fetch origin 39e918224abfb38e4fc56723d13f86d3fc4876a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-alecthomas-participle2
 * [new ref]         39e918224abfb38e4fc56723d13f86d3fc4876a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39e9182 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild