$ git clone -n https://src.fedoraproject.org/rpms/jakarta-activation1.git /var/lib/mock/f41-build-1182628-21975/root/chroot_tmpdir/scmroot/jakarta-activation1
Cloning into '/var/lib/mock/f41-build-1182628-21975/root/chroot_tmpdir/scmroot/jakarta-activation1'...
$ git fetch origin 1cb8074cf91c3b7d6be73b5ba282690cc2edca84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-activation1
 * [new ref]         1cb8074cf91c3b7d6be73b5ba282690cc2edca84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cb8074 Rebuilt for java-21-openjdk as system jdk