$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-collections.git /var/lib/mock/f41-build-710658-13019/root/chroot_tmpdir/scmroot/apache-commons-collections
Cloning into '/var/lib/mock/f41-build-710658-13019/root/chroot_tmpdir/scmroot/apache-commons-collections'...
$ git fetch origin 2f8d5d52bea7942b81f2c233d04d5982146a7a3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-collections
 * [new ref]         2f8d5d52bea7942b81f2c233d04d5982146a7a3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f8d5d5 Rebuilt for java-21-openjdk as system jdk