$ git clone -n https://src.fedoraproject.org/rpms/gdcalc.git /var/lib/mock/f45-build-9665-407/root/chroot_tmpdir/scmroot/gdcalc
Cloning into '/var/lib/mock/f45-build-9665-407/root/chroot_tmpdir/scmroot/gdcalc'...
$ git fetch origin 9b1c7558d725c927ab57f619e35bc22ff5423c07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gdcalc
 * [new ref]         9b1c7558d725c927ab57f619e35bc22ff5423c07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b1c755 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild