$ git clone -n https://src.fedoraproject.org/rpms/sstp-client.git /var/lib/mock/f45-build-36441-704/root/chroot_tmpdir/scmroot/sstp-client
Cloning into '/var/lib/mock/f45-build-36441-704/root/chroot_tmpdir/scmroot/sstp-client'...
$ git fetch origin d4a8592065564d84e0886e4e1881a04aff902da1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sstp-client
 * [new ref]         d4a8592065564d84e0886e4e1881a04aff902da1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4a8592 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild