$ git clone -n https://src.fedoraproject.org/rpms/microdnf.git /var/lib/mock/f45-build-18303-513/root/chroot_tmpdir/scmroot/microdnf
Cloning into '/var/lib/mock/f45-build-18303-513/root/chroot_tmpdir/scmroot/microdnf'...
$ git fetch origin 25d4dcd12b15a468572c0d4b789bdef3275be6a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/microdnf
 * [new ref]         25d4dcd12b15a468572c0d4b789bdef3275be6a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25d4dcd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild