$ git clone -n https://src.fedoraproject.org/rpms/libquicktime.git /var/lib/mock/f45-build-16815-491/root/chroot_tmpdir/scmroot/libquicktime
Cloning into '/var/lib/mock/f45-build-16815-491/root/chroot_tmpdir/scmroot/libquicktime'...
$ git fetch origin 0293492e2e8a9648b63cb166ac74425007e327d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libquicktime
 * [new ref]         0293492e2e8a9648b63cb166ac74425007e327d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0293492 Disable retired schroedinger on F45+ (resolves rhbz#2507938)