$ git clone -n https://src.fedoraproject.org/rpms/maven-shared-incremental.git /var/lib/mock/f40-build-2500947-61672/root/chroot_tmpdir/scmroot/maven-shared-incremental
Cloning into '/var/lib/mock/f40-build-2500947-61672/root/chroot_tmpdir/scmroot/maven-shared-incremental'...
$ git fetch origin b0cce61b2eff0c579b65ad38c6fab0ef73aa77ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-shared-incremental
 * [new ref]         b0cce61b2eff0c579b65ad38c6fab0ef73aa77ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0cce61 Rebuilt for java-21-openjdk as system jdk